KVM Virtualization on top of the vmware workstation 12 guest vm‘s

Kernel-based Virtual Machine (KVM) provides a possibility to use the Oracle (or Redhat/CentOS) Linux kernel as a hypervisor.

In my example, I will configure the KVM virtualization on top of the guest vm running OEL 7.4. The guest VM is running on top of the VMWare Workstation 12.

To enable the virtualization layer select VM settings and navigate to the Processor settings. Enable the setting „Virtualize Intel VT-x/EPT or AMD-V/RVI.“

The Guest VM is now enabled for the using of the nested virtualization (such kvm). Start the Guest VM.

Install and configure KVM virtualization on the OEL 7.4 Linux

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Extend Filesystem /u01 on an Exadata ComputeNode

Do you know the problem: an Exadata does not have enough space in filesystem /u01? The Exadata has the locale storage and you can increase /u01.


1. Check filesystem and associated volume:

[root@myexadb01]# df -h

Filesystem                      Size    Used    Avail    Use%    Mounted on
/dev/mapper/VGExaDb-LVDbSys1     30G    23G    5.7G    80%    /
tmpfs                           757G    4.0K    757G    1%    /dev/shm
/dev/sda1                       488M    48M    405M    11%    /boot
/dev/mapper/VGExaDb-LVDbOra1    158G    107G    43G    72%    /u01

Check the free space in the volume group:

[root@myexadb01]# pvs
PV         VG        Fmt    Attr    PSize    PFree
/dev/sda2    VGExaDb   lvm2   a—u     1.63t    1.38t

Weiterlesen „Extend Filesystem /u01 on an Exadata ComputeNode“

Upgrade Grid Infrastructure 12.1 to 12.2 + Install the 2017 August Release Update (RU) on Exadata


This document describes the upgrade of the GI from 12.1 to 12.2 with installation of the RU August 2017.

The Exadata consists of:

  • Two db nodes: exadb1/exadb2
  • Three cell servers

The software release of Exadata components:

Infiniband Software version:    2.2.6-2 (Juli 2017)
Storage cells version:
DB node versioin:     
GI Version:           
RDBMS Version:        

The order of the action:

  • Out of the place installation of the Grid Infrastructure 12.2 on all database servers
  • Installation RU Patch August 2017 on all database servers
  • Upgrade Gird Infrastructure to 12.2

Weiterlesen „Upgrade Grid Infrastructure 12.1 to 12.2 + Install the 2017 August Release Update (RU) on Exadata“

How to configure the WebLogic AdminServer for High Availability


The high availability of applications in the WebLogic environment is realized by clustering. Managed servers in the cluster work together. The information about transactions is distributed cluster-wide. If a cluster member fails, another server takes over the tasks of the failed server and executes them. In this way, the applications are kept running without interruption.

The AdminServer is a single point of failure: if the server fails, the Domain is no longer administrable:

– Configuration changes cannot be performed

– The administration console is not available

The managed servers are still running and can continue to work, even if the AdminServer is not available: this requires the activation of MSI (Managed Server Independence) Mode.

How can the AdminSevrer be protected from failure? In this blogpost I will describe all the steps that are necessary to keep your server running safely.

Weiterlesen „How to configure the WebLogic AdminServer for High Availability“

How to hide passwords and account information in WLST scripts (WebLogic Server)

If you are worried about your password showing up in clear text in the startup scripts, you can use the storeUserConfig command to generate encrypted userconfigFile and a userKeyFile that you can then use in the „nmConnect“ and „connect“ command.

Place there two files on the protected place and decide to set right permissions

Create storeUserConfig for the Node Manager

Start wlst via the shell script $ORACLE_HOME/oracle_common/common/bin/wlst.sh:


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Advanced OHS Configuration in Oracle Forms

In this blog entry I will describe two topics:

  • Configuration OHS to listen on the Port 80
  • Configuration access to the AdminConsole / EM via HTTP Port

Configuration OHS to listen on the Port 80

After the initial installation of Forms is the OHS configured for the listening on the Port 7777. If you would change the listening to the Port 80 execute following steps

Change Permissions for the File launch (as root!!!):

chown root ${MIDDLEWAR_HOME}/Oracle_Home/ohs/bin/launch
chmod 4750 ${MIDDLEWAR_HOME}/Oracle_Home/ohs/bin/launch

Edit the file httpd.conf

Weiterlesen „Advanced OHS Configuration in Oracle Forms“

Oracle Forms & Reports Create and Configure on the OEL 7.2 Server


This post focuses on the creation, configuration and tuning of an initial Forms & Reports Domain on the OEL 7.2 Server.

The WebLogic Server is a necessary requirement, and must already be installed. For instruction how to install the WebLogic Server please refer to my previous post: WebLogic Server Installation on the Linux OEL 7: step by step instruction

The following tasks will be implemented:

  • Preparing the Operating System for the installation of the WebLogic Server, Installation JDK 1.8 and the WebLogic Server
  • Creating of database schemas
  • Installing and Configuring a Forms & Reports Domain
  • Post-Installation Tasks:
    • Configuring of components
    • Creating of Start & Stop scripts for the automatic start/stop of components
  • Tuning and Troubleshooting

The Domain will be created on the one OEL 7.2 server: host03.example.com (IP

Installation Forms & Reports

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